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Tuning the Selective Adsorption Site of Biomass on Co3O4 by Ir Single Atoms for Electrosynthesis
Advanced Materials ( IF 27.4 ) Pub Date : 2021-01-20 , DOI: 10.1002/adma.202007056
Yuxuan Lu, Tianyang Liu, Chung‐Li Dong, Yu‐Cheng Huang, Yafei Li, Jun Chen, Yuqin Zou, Shuangyin Wang

The electrosynthesis from 5‐hydroxymethylfurfural (HMF) is considered a green strategy to achieve biomass‐derived high‐value chemicals. As the molecular structure of HMF is relatively complicated, understanding the HMF adsorption/catalysis behavior on electrocatalysts is vital for biomass‐based electrosynthesis. The electrocatalysis behavior can be modulated by tuning the adsorption energy of the reactive molecules. In this work, the HMF adsorption behavior on spinel oxide, Co3O4 is discovered. Correspondingly, the adsorption energy of HMF on Co3O4 is successfully tuned by decorating with single‐atom Ir. It is observed that compared with bare Co3O4, single‐atom‐Ir‐loaded Co3O4 (Ir‐Co3O4) can enhance adsorption with the CC groups of HMF. The synergetic adsorption can enhance the overall conversion of HMF on electrocatalysts. With the modulated HMF adsorption, the as‐designed Ir‐Co3O4 exhibits a record performance (with an onset potential of 1.15 VRHE) for the electrosynthesis from HMF.

中文翻译:

用Ir单原子调节电合成Co3O4上生物质的选择性吸附位。

5-羟甲基糠醛(HMF)的电合成被认为是实现源自生物质的高价值化学品的绿色策略。由于HMF的分子结构相对复杂,因此了解HMF在电催化剂上的吸附/催化行为对于基于生物质的电合成至关重要。可以通过调节反应性分子的吸附能来调节电催化行为。在这项工作中,发现了HMF在尖晶石氧化物Co 3 O 4上的吸附行为。相应地,通过用单原子Ir修饰成功地调整了HMF在Co 3 O 4上的吸附能。可以看出,与裸露的Co 3 O 4相比,单原子铱负载的Co3 O 4(Ir-Co 3 O 4)可以增强HMF的CC基团的吸附。协同吸附可以增强HMF在电催化剂上的总转化率。通过调制的HMF吸附,设计好的Ir-Co 3 O 4在HMF的电合成方面表现出创纪录的性能(起始电位为1.15 V RHE)。
更新日期:2021-02-22
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